Relaxation at High-Index Surfaces Studied by Atomic-Resolution Scanning Tunneling Microscopy: Au(311), (533) and (221) Electrochemical Interfaces.

Abstract

Atomic relaxation at the stepped surfaces Au(311), (533), and (221) in aqueous solution is examined by atomic-resolution scanning tunneling microscopy (STM). The former two surfaces yield ordered (1 x 1) domains at electrode potentials corresponding to near-zero or positive electronic charges. Substantial surface relaxation is observed, however, at more negative potentials, featuring displacements of the step edge and neighboring atomic rows. The Au(221) surface exhibits a marked relaxation at positive as well as negative electronic charges. The so-far underutilized value of STM for exploring atomic structure at stepped surfaces is demonstrated by these findings.

Document Details

Document Type
Technical Report
Publication Date
May 01, 1992
Accession Number
ADA251414

Entities

People

  • A. Hamelin
  • Michael J. Weaver
  • Xiangyu Gao

Organizations

  • Purdue University

Tags

DTIC Thesaurus Topics

  • Aqueous Solutions
  • Atomic Structure
  • Displacement
  • Electrodes
  • Microscopy
  • Quantum Tunneling
  • Scanning
  • Tunneling

Fields of Study

  • Physics

Readers

  • Electrochemical Surface Science
  • Nanofabrication and Microfabrication.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene